The short answer
Not necessarily. Purging is very common with ayahuasca, but throwing up is only one way it happens.
Some people throw up every ceremony. Some rarely do, and some only occasionally. Others spend the night going back and forth to the restroom. Some shake their foot all night, or yawn, or cry. All of that is purging.
Vomiting is still the most common form. The largest survey of ayahuasca drinkers to date, the Global Ayahuasca Survey, gathered responses from 10,836 people in more than 50 countries. Nearly 70% reported acute physical effects, mostly vomiting. Only 2.3% said they needed medical attention afterward.
So it's common, and it's rarely dangerous. And in the traditions ayahuasca comes from, purging isn't a side effect to put up with. It's part of the medicine. It even has a name: la purga, the purge.
Here's why it happens, what it actually feels like, and how to work with it instead of dreading it.
Why ayahuasca makes you throw up
Ayahuasca is a brew of two plants. The vine, Banisteriopsis caapi, contains alkaloids called harmine, harmaline and tetrahydroharmine. The leaf (we use chacruna) contains DMT. On its own, swallowed DMT gets broken down in the gut before it can do much. The vine's alkaloids block the enzyme that breaks it down, so the DMT can reach the brain.
That same chemistry is a lot for your stomach. A few things are going on at once:
Your gut is full of serotonin receptors. Ayahuasca raises serotonin activity in the gut as well as the brain. That speeds everything up in your digestive tract and can stimulate the vagus nerve, which runs between your gut and your brain.
The vine itself is emetic. In a recent clinical study of pure harmine given to healthy volunteers, nausea and vomiting were the most common side effects at higher doses. The researchers concluded harmine likely contributes to the vomiting people experience with ayahuasca.
It tastes the way it tastes. Most people find the brew bitter, earthy and thick. The taste can turn your stomach right after you drink. But the deeper purge usually comes later, once the medicine is working, which tells you it's more than the flavor.
In plain terms: your body is responding to something powerful. That's not your body failing. It's your body doing exactly what bodies do with this medicine.
Why the tradition welcomes the purge
Here's where the Western mind and the Amazonian one part ways. To a doctor, vomiting is a symptom. To the people who have worked with this medicine for generations, it's one of the reasons you drink.
The language gives it away. Among mestizo healers in Peru, a common name for ayahuasca is simply purga, and the healer who serves it can be called the purguero. In the Matsigenka language, ayahuasca is kamarampi, which translates roughly as "remedy for vomiting." Even the word for being under the medicine's effects, mareación, comes from the Spanish for feeling dizzy, seasick and nauseous. Being buen mareado, well and truly in it, is a good thing.
In the Shipibo tradition we work within, through the lineage of Don Enrique Lopez, purging is understood as cleansing, or limpieza. What leaves the body is understood to carry something heavier with it: old grief, fear, things you've been holding that were never yours to hold. The icaros, the healing songs sung through the night, help move it along.
You don't have to believe any of that to drink. Plenty of people arrive skeptical. But most people who purge describe something that doesn't feel like food poisoning. It feels like letting go.
Purging isn't only throwing up
Vomiting gets all the attention, but it's one of many ways the body releases in ceremony. All of these count:
Crying. Sometimes quiet tears, sometimes sobbing you didn't know was in there.
Yawning. Deep, repeated, jaw-cracking yawns are one of the most common purges, and one of the least talked about.
Shaking or trembling. A foot that bounces all night, or a tremble that comes in waves.
Sweating, burping, coughing or sighing.
Laughing. Yes, really. Some people laugh for an hour and can't tell you why.
Diarrhea. Some people spend more time in the restroom than over a bucket. You'll want to know where it is before the lights go down.
Some people purge one way all night. Some move through several. Nobody purges "wrong."
What it's actually like
The fear is usually worse than the thing.
Most people picture the worst stomach flu of their life. That's not how it tends to go. The nausea builds in waves as the medicine comes on, often within the first hour or two. When the purge comes, it comes fast. You lean over your bucket, it moves through, and it's over in a minute or two. Then a lot of people feel lighter. Clearer. Sometimes the whole night shifts after it.
You won't be doing it alone or in secret, either. Everyone in the room has a bucket. Everyone is going through their own version of this. Nobody is watching you, and nobody cares how it sounds. That takes a surprising amount of the embarrassment out of it.
What if I don't purge?
That's fine too. Not purging doesn't mean the medicine isn't working, or that you did something wrong. Some people never vomit in ceremony. Some purge in one ceremony and not the next. The medicine meets you where you are, and it doesn't follow a script.
How to prepare (and how to purge well)
You can't promise yourself you won't purge. You can make it easier on your body and your mind.
Before ceremony
Follow the dieta. Eating simply in the days and weeks before ceremony, without heavy, processed, salty or spicy food, alcohol or pork, is part of the tradition. It also leaves your body less to clear out. Our [dieta guide] covers what to eat and why.
Eat lightly on ceremony day. Follow your retreat's guidance on when to have your last meal. Here at Gaian Rhythm we encourage guests to have a light lunch and stop eating at least 4 hours prior to the start of ceremony.
Hydrate earlier in the day. Drink plenty of water in the morning and afternoon, then taper off before ceremony so you aren't sitting with a full stomach of water.
Don't take anything to stop the nausea unless your facilitators have cleared it. Some medications and supplements don't mix with ayahuasca. This is what your intake screening is for.
During ceremony
Keep your bucket close and sit upright if you can. Lying flat makes nausea worse for most people.
Breathe. Slow breaths out through the mouth help a wave pass, or help it come.
Don't fight it. Holding a purge back usually makes the nausea last longer. When it wants to come, let it.
Ask for help. Our facilitators are there all night. A cool cloth, a tissue, a hand on your back, help to the bathroom. That's what we're there for.
When it isn't normal
Purging during ceremony is expected. A few things are not, and you should tell a facilitator right away if you notice them:
You still can't keep water down hours after ceremony has closed.
Signs of dehydration: dizziness when you stand, a racing heart, very dark urine or none at all.
Vomiting blood, or severe pain in your stomach or chest.
A high fever, heavy sweating with muscle rigidity or twitching, or confusion that doesn't ease as the medicine wears off. These can be signs of serotonin syndrome, which is rare but serious, and usually linked to mixing ayahuasca with certain medications.
This is exactly why honest screening matters, and why we ask that you be honest about any medications you are taking or medical conditions you may have. If you want the full picture on medications, health conditions and preparation, read our guide to [ayahuasca safety, contraindications and how to prepare].
Quick answers
How soon after drinking will I throw up? It varies. Some people feel nausea within minutes from the taste. The main purge often comes as the medicine peaks, usually in the first hour or two, but it can come at any point in the night.
Will I throw up every ceremony? Not necessarily. Some people throw up every time, some rarely, some occasionally. Your body may purge a different way from one ceremony to the next.
Does a second cup make it worse? Not reliably. Some people purge after a second cup, some don't. Your facilitators will check in with you before offering more.
Is it embarrassing? It feels like it will be. Once you're in the room, almost everyone finds it isn't. Everyone has a bucket for a reason.
Sit with us
If the purge is the thing holding you back, you're in good company. It's one of the most common fears we hear from first-timers, and one of the first things they laugh about by morning.
Gaian Rhythm holds seasonal ayahuasca retreats across the United States, rooted in the Shipibo tradition and timed to the turning of the year. Every retreat includes preparation guidance before you arrive, an experienced team in the room all night, and integration support after. See our upcoming ayahuasca retreats.
